Disable automatic versioning by default

- Remove mix:versionable from fedora:resource definition
- Add integration tests for copying between repo and federated filesystem
- Use FedoraFileSystemConnector instead of Modeshape's in HTTP API tests
- Remove HTTP API dependency from FedoraFileSsytemConnector to prevent circular dependency

Resolves both: https://www.pivotaltracker.com/story/show/67663658 , and
               https://www.pivotaltracker.com/story/show/65600152